Electron microscope



FIG. 1 is a perspective view of the electron microscope showing our newdesign;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top elevation view thereof; and,

FIG. 7 is a bottom perspective view.

The broken lines illustrate portions of the electron microscope thatform no part of the claimed design.

The ornamental design for an electron microscope, as shown anddescribed.